Printing machine for multicolor work



une 28, 932- v. E. GNAUDAN PRINTING MACHINE FOR MULTICOLOR WORK Filed Jan. 23, 1929 2 Sheets-511991; l

jf 28, 1932. v E @WAUDAN 1,855,184

PRINTING MACHINE FOR MULTICOLOR WORK Filed Jan 23, 1929 2 Sheets-Sheet 2 Patented .lune 28, 1932 PATENT OFFCE VICTOR ENRIQUE GIVAUDAN, OF MEXICO CITY, MEXICO PRINTING MACHINE FOR MULTICOLOR WORK Application filed January 23, 1929, Serial No. 334,524, and in Mexico August 14, 1928.

The invention relates to printing machines for color work and the principal object consists in providing a machine in which printing with a plurality of colors can be effected by the use of a single electrotype.

lt is a further object of the invention to provide movable inking members which are raised and lowered in order to co-me in contact with a certain ink drum provided with a desired color to impart such color to the electrotype.

It is a. further object of the invention to provide a cylinder, the surface of whichis composed of a plurality of blocks and which cylinder co-operates with another cylinder carrying the electrotype, said blocks being raised one at a time and once during the revolution of the cylinder.

It is a further object of the invention to provide certain details of construction and arrangement tending to enhance the efficiency and adaptability of a machine of the character described.

`With these and other equally important ob- `iects in view which will become apparent from a perusal of the invention, the latter comprises the means set forth in the specification particularly pointed out in the claims forming a part thereof, and illustrated in the accompanying drawings, in which Fig. l is a front view of the machine, partly in section, with the ink drums at the left shown in idle position.

Fig. 2 is an enlarged fragmentary section through the top cylinder,

Fig. 8 is a detail view in perspective of the printing blocks and associated parts.

rPhe same letters of reference throughout all the figures indicate the same parts.

The frame of the machine is composed of two main posts D upstanding from a flat base and connected by transverse braces carrying the axles of three cylinders, A, B and C.

The diameter and the form of these cylindcrs are the same, and the cylinders are supported in ball bearings Z.

A paper band fro-m a. roll (not shown) is introduced between the cylinders B-C and receives impressions from an electrotype Y mounted on the cylinder B.

The impression cylinder C is driven by a gear E on a motor shaft and transmits rotary movement by gears to the other cylinders A--B which rotate as indicated by arrows in F ig. 1.

The cylinder A is hollow and surrounds a stationary drum S provided on a shaft V. The drum S is provided with a plurality of parallel circumferential grooves, in which grooves cams O are provided, as will be hereinafter further referred to.

At each end of the shaft V a circular disk A is provided which rotates on ball bearings provided on the shaft. The disks are connected by beams b held thereto by set screws g (Fig. The beams Z9 are equipped with perforationsl in registry with the grooves in the drum S.

Above thebeamsba-reprovided bars P with apertures for the passage of pins equipped 7 with a rubber block Z at the upper end and with a base piece f. Springs e are interposed between the bars P' and the base piece f to hold the blocks in contact with the outer surface of the bars P.

As appears from Fig. 2, the base piece f is of sufiicient size to cover exactly four perforations in the beams Z). Normally the pin rests with its end m on the upper surface of the beams b and enters with its shank portions a registering groove in the stationary drum S. rlhe disks are provided with crowns X and when they are rotated the beams b and the bars P are carried along and the pins slide in the grooves in which they enter.

In order to` raise the individual blocks a for contact with one of several inkers F the cam O secured to the bottom of each groove in the drum S will lift the base piece f, the pin and the block a. After passing the cam O the compressed spring e will force the block t into engagement with the outer face of the bar P.

A pin placed in any of the four perforations of the bea-m b appertaining to the base piece /f will raise the same, but as the cams are arranged in different positions in the four grooves the lifting of the block will oecur at dierent times during the rotation of the two disks A.

In the embodiment four cams 0 are shown to correspond with the number of inkers utilized which have different colors to obtain multicolor prints with the use of a single electrotype.

For each block a to be raised only one pin is inserted in the beam b according to the color wanted on said block, and as there is only one eccentric in each circumferential groove, the block will only be raised once during each revolution of the disks. Thus, any numbers of bars necessary will form the inner circumference of the cylinder which receives the ink while the outer circumference will be constituted by small squares a which will raise one by one and only once during one rotation of the cylinder.

The ink drums F (F ig. l) and the distributing rolls G in contact therewith are mounted on their respective shafts in the cross bars Q, the former in the center of the cross bars and the latter in bearings T on rails shown in the drawing, which permit regulation of pressure of rolls against the ink drum F by means of a screw U. These sections of cylinders together with t-he cross bars are mounted in a socket formed in quadrants L and may be adjusted with respect to the surface of the cylinder A by means of a slot 7 and a set screw.

The quadrants L may be shifted transversely to the aXis of cylinder A in a groove provided in a rail IV removing previously plates N, and with the object of uncovering the upper part of the cylinder A to permit removal of the beams b and bars P.

The plates N placed between the drums I and the rolls F (Fig. l) are removable and permit the cylinders J, whose bearings slide in the same groove of the rail W, to soak up the ink before they contact with the rolls G, to thus Vprovide uniform inking.

The upper plates N and the drums which furnish ink to these plates are mounted on posts M secured by means of screws to the rail W The drums J moved by connecting rods (K) and sliding in the rail W effect a reciprocatory movement between drums I and the drums F and rolls G over the surface of the plates N.

The connecting rods K are actuated by cranks on pulleys H to which rotation is transmitted from a pulley H by means of a belt. The pulley H is fixed to the shaft of the cylinder B.

From the foregoing, it will be seen that the construction according to my present invention assures a greater effectiveness in work and better facilities for dismounting and repairs as well as better final results in the products of the machine.

While the drawings disclose a preferred embodiment of my invention, various changes and alterations may be made within the scope of the invention.

I, therefore, do not limit myself to the details of construction or arrangement as shown but claim my invention as broadly as the state of the art permits.

I claim:

l. In a rotatory printing machine for color work having' a plurality of ink drums with different colors, a plurality of cylinders supported in operative contact, one of said cylinders having a circumference formed by printing blocks, and adjustable stationary means for successively placing said blocks during each revolution of said one cylinder in contact with a plurality of said ink drums and subsequently with another one of said cylinders.

2. In a rotatory printing machine for color work having a plurality of ink drums with different colors, a plurality of cylinders supported in operative contact, one of said cylinders having a circumference formed by a plurality of printing blocks, and adjustable stationary means for successively and selectively placing said blocks during each revolution of said one cylinder in contact with a plurality of said inlr drums and subsequently with another one of said cylinders.

VICTOR ENRIQUE GIVAUDAN. 

